Related Party and Similar Transactions (Details) (USD $)		12 Months Ended					0 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2012 Charles F. Willis	Dec. 31, 2012 Island Air item	Dec. 31, 2011 Island Air	Dec. 31, 2010 Island Air	Dec. 31, 2008 J.T. Power item	Dec. 31, 2012 J.T. Power	Mar. 07, 2012 J.T. Power Consignment agreement with guarantee item	Feb. 22, 2012 J.T. Power Consignment agreement with guarantee	Dec. 31, 2012 J.T. Power Consignment agreement with guarantee	Dec. 31, 2008 J.T. Power Consignment agreement with guarantee item	Jul. 31, 2009 J.T. Power Consignment agreement without guarantee item	Dec. 31, 2012 J.T. Power Consignment agreement without guarantee	Feb. 22, 2012 J.T. Power Minimum Consignment agreement with guarantee
Related Party and Similar Transactions
Percentage of ownership interest in the entity by related party	31.00%
Percentage of discount at which note is prepaid in cash		45.00%
Number of consignment agreements with related party					2
Book value of engines consigned for sale upon teardown of engine parts										$ 5,200,000	$ 23,000
Sales of consigned parts by related party									18,100			52,600
Net consignment proceeds from related party													4,000,000
Consignment proceeds obligation from related party								1,300,000
Required quarterly consignment payments by related party							45,000
Payment term of consignment proceeds by related party							5 years
Interest rate on payment of consignment proceeds by related party (as a percent)							6.00%
Number of quarterly consignment payments which can be skipped by related party							1
Interest rate for skipped payment (as a percent)							12.00%
Principal amount owing under the note						1,200,000
Number of engines consigned for sale upon teardown of engine parts										4	1
Number of DeHaviland DHC-8-100 aircraft leased under operating lease		1
Number of DeHaviland DHC-8-100 aircraft leased under capital lease		2
Number of spare engines leased		1
Due from related parties		4,500,000
Note receivable		650,000
Lease rent revenue		600,000	1,600,000	400,000
Notes receivable prepaid at discount		400,000
Lease rent revenue under finance and operating leases expected to be recorded through December 2015		6,200,000
Net book value of leased assets		$ 4,000,000